Carbide cutter insert replacements are a lifesaver Three sided blade insert can be rotated 120 degrees, for a total of three rotations Replacement inserts fit select models of the MP Basic, the MP Pro Scout and the MP Legend Servicing a number of the Gerber multi-tool platforms, these carbide cutter insert replacements are a lifesaver. Once you have used all three rotations of the current insert, replacement is a breeze with the T8 wrench, 4 replacement screws, and 2 included replacement blades.